Cosmetic brush



FIG. 1 is a perspective view of a cosmetic brush showing the new design;

FIG. 2 is a front elevation view of the cosmetic brush of FIG. 1, the back view of the cosmetic brush being identical to the front view;

FIG. 3 is a top plan view of the cosmetic brush of FIG. 1;

FIG. 4 is a bottom plan view of the cosmetic brush of FIG. 1;

FIG. 5 is a bottom plan view of the cosmetic brush of FIG. 1, omitting hair of the brush for clarity; and,

FIG. 6 is a left side elevation view of the cosmetic brush of FIG. 1, the right side view of the cosmetic brush being identical to the left side view.

The broken lines in the drawings illustrate unclaimed portions of the cosmetic brush and form no part of the claimed design. It should be understood that the claimed design extends to the broken line boundary in FIG. 5, but does not include the boundary or the area within the boundary. 

The ornamental design for a cosmetic brush, as shown and described. 